There are numerable course and career choices, after 12th in PCMB. You may pursue Engineering, Medical, Science or other interesting options like Pharmacy, Business Administration/Management Studies, Computer Applications, Law or many other courses. I understand you dont have any particular interests currently, but at this stage of life you must be aware of what youd like to be like in future or your ambition. Choose a Course, which would perhaps help you achieve that ambition. Do comment below regarding you Career Ambition, and I could perhapd help you with the Course you must pursue after 12th in PCMB.

For more information about Career Options and Courses after 12th do follow the link below

https://school.careers360.com/articles/courses-after-12th/amp